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Finding the Fourth Proportional to 18,273.62, 25,217.68 and 9,890.12

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Solution

The fourth proportional to 18,273.62, 25,217.68 and 9,890.12 is: 13,648.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,273.62 : 25,217.68 = 9,890.12 : x
  2. Step 2: Convert to fraction form
    18,273.62/25,217.68 = 9,890.12/x
  3. Step 3: Cross multiply
    18,273.62x = 25,217.68 × 9,890.12
  4. Step 4: Simplify right side
    18,273.62x = 249,405,881.32
  5. Step 5: Solve for x
    x = 249,405,881.32/18,273.62
  6. Step 6: Final answer
    x = 13,648.41

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.